| // run | |
| // Copyright 2011 The Go Authors. All rights reserved. | |
| // Use of this source code is governed by a BSD-style | |
| // license that can be found in the LICENSE file. | |
| // Test run-time error detection for interface values containing types | |
| // that cannot be compared for equality. | |
| package main | |
| func main() { | |
| cmp(1) | |
| var ( | |
| m map[int]int | |
| s struct{ x []int } | |
| f func() | |
| ) | |
| noCmp(m) | |
| noCmp(s) | |
| noCmp(f) | |
| } | |
| func cmp(x interface{}) bool { | |
| return x == x | |
| } | |
| func noCmp(x interface{}) { | |
| shouldPanic(func() { cmp(x) }) | |
| } | |
| func shouldPanic(f func()) { | |
| defer func() { | |
| if recover() == nil { | |
| panic("function should panic") | |
| } | |
| }() | |
| f() | |
| } | |